C11112331312111112111133133313331333132322121111331323231131221211   >>    C1111233131211111211113313331333133313232212111133132323113122121   <<    C11112331312111112111133133313331333132322121111331323231131221213   >>      C11112331312111112111133133313331333132322121111331323231131221212   >>